<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script>
window.onload=function ()
{
var oBtn=document.getElementById('btn1')

//不取函数名的方法：
oBtn.onclick=function abc()
{
	alert('a')
};
};
</script>
<!--取名
functin abc()
alert ('a')
oBtn.onclick=abc;
-->
</head>

<body>
<input type="button" id="btn1" value="按钮" />

</body>
</html>
